End-user troubleshooting of bad c-ares interaction with router

[Brad House]

I think homebrew distributes the 'adig' and 'ahost' utilities from 
c-ares.  Can you try using those to do the same lookup so we can see the 
results?

On 1/19/24 11:01 AM, Nicholas Chammas wrote:
>
>> On Jan 17, 2024, at 3:38 PM, Brad House <brad at brad-house.com> wrote:
>>
>> What version of c-ares is installed?
>>
> Sorry about the delay in responding. Answering this question is more 
> difficult than I expected.
>
> I know that Spark Connect is running gRPC 1.160.0. Looking through the 
> gRPC repo, I see mention of c-ares 1.13.0 
> <https://github.com/grpc/grpc/blob/v1.60.0/cmake/cares.cmake#L42>, but 
> I don’t know how that translates to my runtime. Homebrew tells me I 
> have c-ares 1.25.0 installed, but again, I’m not sure if that’s what 
> I’m actually running.
>
> Is there a way I can directly query the version of c-ares being run 
> via Spark Connect / gRPC? I asked this question on the gRPC forum 
> <https://groups.google.com/g/grpc-io/c/3tZCa48Xvh8> but no response yet.
>
> For the record, I know that c-ares is involved because if I tell gRPC 
> to not use it (via GRPC_DNS_RESOLVER=native 
> <https://github.com/grpc/grpc/blob/b34d98fbd47834845e3f9cdaa4aa706f1aa4eddb/doc/environment_variables.md>) 
> then my problem disappears.
>>
>> What DNS servers are configured on your MacOS system when its not 
>> operating properly?  The output of "scutil --dns" would be helpful here.
>>
> Here’s that output. 
> <https://gist.github.com/nchammas/a4c9873d8158c323796e9b47c064e63a#file-scutil-dns-txt> I 
> believe 192.168.1.1 is just my local router, and on there is where I 
> have the default DNS servers set to 1.1.1.1 and 1.0.0.1.
>
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